2022 Model 3 LR.(Salvage vehicle) HV Battery contactors not closing due to crash event in VCfront

[Asher Yatzar]

Usually salvaged cars sat on auctions for long enough where the LV battery needs replacement. You can test by checking voltage between the small pin that is closest to the center of the battery and the negative battery terminal. If that voltage is below 9V then you need to replace the battery.

To be honest I think it was your video that showed me how to charge mine so I can't argue you with you lol

LI batteries once below a certain level the BMS shuts off and the battery is just stagnant. 3 months it should totally be fine to get charged up like you showed in your video. If your LI battery that's supposed to last the lifetime of the car won't take a charge its prob because the BMS was messed up on disassembly. Unlike lead acids batteries leaving them in the car doesn't drain them down since the BMS shuts off. Once the BMS is off there is 0 draw on the battery

This is my theory I don't claim any of this as a fact

 

[evrepair]

To be honest I think it was your video that showed me how to charge mine so I can't argue you with you lol

LI batteries once below a certain level the BMS shuts off and the battery is just stagnant. 3 months it should totally be fine to get charged up like you showed in your video. If your LI battery that's supposed to last the lifetime of the car won't take a charge its prob because the BMS was messed up on disassembly. Unlike lead acids batteries leaving them in the car doesn't drain them down since the BMS shuts off. Once the BMS is off there is 0 draw on the battery

This is my theory I don't claim any of this as a fact

Unfortunately the BMS never shut off. It constantly balances the cells, which takes some power. These batteries go down to 3 volts in a few months. Trust me we would recharge them if we could.

 

[Asher Yatzar]

Usually salvaged cars sat on auctions for long enough where the LV battery needs replacement. You can test by checking voltage between the small pin that is closest to the center of the battery and the negative battery terminal. If that voltage is below 9V then you need to replace the battery.

Unfortunately the BMS never shut off. It constantly balances the cells, which takes some power. These batteries go down to 3 volts in a few months. Trust me we would recharge them if we could.

Ah interesting. Mine sat for almost 3 months and tool a charge. Guess I got lucky!

 

[evrepair]

It may also depend on the version of the software in the battery. Maybe newer versions last longer?

 

[JanMozol]

Hi guys, I have two 2022 , and I did everything and just came back to run after replace vc_front on both.